SKM PTW Cable Modelling

Hello Experts,

I am using SKM PTW for power system modelling. As a part of one project I am requiring to model the LV/MV/HV cables.

I just want to understand how can I calculate the reactance values and admittance values for particular sizes of LV/MV/HV cables, as they are not included in the Olex cable catalogues. I am using the Olex cable catalogues.

Your cooperative response will be truly appreciated.